Airworthiness Directives; Cessna Aircraft Company Models 441 and F406 Airplanes

概要

This document proposes to supersede Airworthiness Directive (AD) 2002-09-13, which currently requires a one-time inspection of the fuel boost pump wiring inside and outside the boost pump reservoir and repair or replacement of the wiring as necessary on certain Cessna Aircraft Company (Cessna) Model 441 airplanes. AD 2002-09-13 resulted from several reports of chafing and/or arcing of the fuel boost pump wiring inside and outside the fuel pump reservoir. This proposed AD would retain the actions required in AD 2002-09-13, make the one-time inspection repetitive, require the inspection and possible replacement of the wire harness, lead wires and fuel boost pump on Model F406 airplanes, and require eventual installation of an improved design wire harness and fuel boost pump as terminating action for the repetitive inspections. The actions specified by this proposed AD are intended to detect, correct, and prevent chafing and/or arcing fuel boost pump wiring, which could result in arcing within the wing fuel storage system. Such a condition could lead to ignition of explosive vapor within the fuel storage system.